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B. Highway 212 Update, Project 03-09 CITY OF CHANHASSEN 7700 Market Boulevard PO Box 147 Chanhassen, MN 55317 Administration Phone 952.2271100 Fax 952.2271110 Building Inspections Phone 952.2271180 Fax 952.2271190 Engineering Phone 952.227 1160 Fax 952.2271170 Finance Phone 952.2271140 Fax 952.227 1110 Park & Recreation Phone 952.2271120 Fax 952.227 1110 Recreation Center 2310 Coulter Boulevard Phone 952.227 1400 Fax 952.227 1404 Planning & Natural Resources Phone 952.2271130 Fax 952.227 1110 Public Works 1591 Park Road Phone 952.2271300 Fax 952.2271310 Senior Center Phone 952.2271125 Fax 952.227 1110 Web Site www.ci.chanhassen.mn.us e, MEMORANDUM TO: Todd Gerhardt, CIty Manager FROM: 1?C1. Paul Oehme, P.E., Director of Public Works/City Engineer DA TE: oYff . June 29, 2006 SUBJ: Highway 212 Update, Project 03-09 BACKGROUND On February 13, 2006, the Council approved a work order for Installation of decorative lighting on the Powers Boulevard Bridge. On February 27,2006, staff updated the CouncIl on the progress of the TH 212 improvements and discussed potential changes to the City's scope of work. These changes included improvements to the anticipated future satellite fire station. DISCUSSION At the February 27, 2006 work session, staff presented the Council with potential changes to the City's scope of work included in the TH 212 contract. The main changes to the scope of work included improvements to the anticipated future satellite fire station. Staff has since received better estimates for the work and also updated costs for the work already included in the contract. Staff also has identified additional needs that should be included in the TH 212 contract. Council also requested additional cost estimates for adding railing on the three main bridge structures over TH 212. Currently, Powers Boulevard, Lyman Boulevard, and TH 101 bridges only have railings on one side of the bridges, the trail side. No railing was included on top of the concrete railing on the non-trail side since it did not meet Federal Highway Association (FHW A) design standards. The design standard requires a raIsed separation from the traveled way to metal rails if constructed on top of a concrete railing. To include a metal railing on the non-trail side of the bridges would reqUIre the railing to be fastened to the outside of the concrete bamer. The railing could only be 2 ft. tall and have a security cable strung through the railing. The concrete railing is stamped at the location were the railing would be connected, whIch would make it more difficult to connect and may look odd. The cost staff received from the contractor for installation of the raIling is $150/lf or $140,000 to install the 2 ft. railing on all three bndges. Staff does not The City ot Chanhassen · A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails, and beautitul parks. A glBat place to live, work, and play Highway 212 Update June 29, 2006 Page 2 recommend including the railing on the non-trail side of the bridges since it could not look hke the other railings, and is expensive. Staff is continuing to work with MnDOT on acquiring the land for the proposed satellite fire station and hopes to have a purchase agreement for Council consideration In the near future. However, staff would like to move ahead with installation of some infrastructure at this time since it will be more expensive to Install the improvements after the TH 212 project is complete. Staff has received updated cost estimates for the Improvements to the fire station property. The additional Improvements proposed include a turn lane, storm water pond expansIOn, and sanitary sewer stub. The prevIOUS estimate Included lowering a 16-inch Magellan pipeline. The Magellan pipeline was recently unearthed and elevations taken when the pipeline in the TH 212 comdor was lowered. Based on this elevatIOn informatIon, It appears the line may not need to be lowered for the fire station. The driveway could be raised slightly over the pIpe to obtaIn the necessary clear distance requirements. The driveway grades would still be acceptable. The original turn lane estimate assumed a full 14 ft. width turn lane and significant gradIng and soil correctIOn. The original estimate did not take into account an 8-ft. shoulder already planned for this area, which can be used for the some of the turn lane. Also, the turn lane grading and soils correction was over estimated. The ongInal estImate for this work was $180,000. The cost estImate for all the work now is $83,772.00. Bluff Creek Dnve will be realigned to the west, thereby eliminating the City bridge costs over Bluff Creek and some traIl length. The savings to the City is $260,000. The alignment of Bluff Creek will take advantage of the grade change at Bluff Creek and will be aligned under TH 212. The water distributIOn comprehensive plan calls for a future watermain to be extended south along Bluff Creek Dnve. A steel casing pipe should be installed under the TH 212 bridge at this tIme to plan for the future extension. If the casing is not put in at this tIme, the cost to extend the watermain in the future will be more expensive and permitting WIth MnDOT will be complicated. The concrete slope paving under the bridge would need to be removed and a portion of Bluff Creek Dnve would need to be replaced during the watermain installation if the casing pipe is not put in at this time. The cost for installatIOn of the casing pipe is $30,646.00. At the last meeting, staff discussed changing the location of the decorative street lighting and adding one street light to the TH 101 Bridge. The current deSIgn has all the street lights on one side of the bridge. The proposed change would stager the lights on the bridge to distribute the hght over the bridge more evenly. The cost for this change is $26,250. G:\eng\th 312\bkgd 062906 council update ws.doc Highway 212 Update June 29, 2006 Page 3 Staff is recommending painting all seven signals being installed in Chanhassen to the standard brown color consistent with the downtown signal color. Also, staff recommended changing all the signal intersection lights to a shoe box fixture consistent with the downtown signal intersection lights. The cost for these signal changes are $14,802.42. The final costs for the sewer and water installed on Powers Boulevard is projected to come in under the preliminary estImate. The sewer needed to be relocated and raised because of poor soils along the original alIgnment. The only impact of these changes would be a need for a future lift statIOn in the Meadow Lark Lane area if this area were ever to be served. The Meadow Lark Lane area is a large lot development and is in the 2020 MUSA area. The estimated cost savings is $80,000. Additional sewer and watermain improvements or changes to the original contract are recommended to plan for future development. The SouthWest Metro development has changed the layout of the sewer and water improvements and is in the City contract. These costs were mcluded in the Development Contract for the project and will be 100% charged to the development. However, a work order WIll need to be approved by the City Council for this change. Also future sewer and water stubs should be stubbed to the property north of the new extensIOn of Lake Susan Drive. These stubs should be extended at this time so City streets and TH 101 will not have to be excavated in the future for the connections. These stubs will be 100% charged to the future developer. The summary of the changes to the TH 212 project are estimated as follows: Improvement Items Cost (+/-) Deduct- Bluff Creek Bndge - $260,000 Add - Lights on Powers Blvd. (Council Approved (Feb. 13th) + $120,000 Add - TH 10 1 Bridge Light Changes + $26,250 Add - Estimate of SatellIte Fire StatIOn Improvements + $83,772 Add - SIgnal Improvements + $14,802 Deduct - Sewer and water Improvements on Powers Blvd. - $80,000 Total - $95,176 The changes bemg proposed would be under the contract amount with MnDOT. Funding for the TH 212 improvements IS being financed with the State of Minnesota Loan agreement. G:\eng\th 312\bkgd 062906 council update ws.doc Highway 212 Update June 29, 2006 Page 4 Staff will give a PowerPoint presentation on Monday evenmg that will cover more specIfic mformation about the projects. Trail Improvements on Lvman Blvd. Trail improvements are planned on the north side of Lyman Boulevard from TH 101 to Quinn Road in conjunction with the TH 212 project. These improvements will provide pedestrian service to properties north of Lyman Boulevard and east of the future park & nde. The trail line is antICIpated to be a highly used corridor because of the park & nde and future retail in the area. Also, this trail will connect into the City's traIl system and the regIOnal traIl system. A trail exists on the south side of Lyman Boulevard east ofTH 101, but a trail is recommended on the north side of Lyman to service the existing and future resIdents. Traffic projections on Lyman will increase as new developments are added, so minimizing pedestnans crossing Lyman Boulevard is important. The City receIved very favorable costs for the traIl improvements in the TH 212 contract. The cost for traIl improvements from the east property line of the park & ride to Quinn Road IS $2,900. If the City elects to remove this trail segment from the contract and constructed it at a later date, the cost would be approxImately $14,500 at present day costs. Staff has been working with the property owners east of the park & nde to try to mItIgate some of the impacts from the Lyman Boulevard and trail improvements. This property owner had been concerned about the trail width, loss of trees, the right turn lane in theIr dnveway, and the close proximity of the trail to their property line. The origmal design called for a 12-ft. wIde trail 4-ft. berm between the back of curb and the traIl, and a 200-ft. right turn lane into the park & ride. Staff has been workIng MnDOT to modify the design to limIt the impacts. The new design calls for a lO-ft. wIde traIl, no berm, and a 100-ft. turn lane. The design change will limit the number of trees that will need to be removed and moves the turn lane away for the driveway. Two trees at the southwest comer of the property may stIll need to be removed. ATTACHMENT 1. Lyman Boulevard Right Turn Lane & Park & Ride Drawing. 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